exam Maths Puzzle Numerical Ability

Find values for m and b in the following system so that the solution to the system is (-3, 4)

5x+7y=b

mx+y=22

Thanks for any help you can give

Heather

Read Solution (Total 0)

exam Other Question

Find the exact solutions of the equation: sin2x+2cosxsin2x=0 for x is greater than or = to 0 and less than or = to 2pie.
I know I use a double angle formula for this but I am not Factor each polynomial, if possible cannot be factored ,write prime.

-49r^2+4t^2

and

4c^2-5d^2

If someone could help me with these two i think i can do the rest of my